Update otel/build-protobuf for multi-architecture support

[jmacd]

Unable to build the opentelemetry-go-proto release for OTLP v0.19.0 on an arm chip because the build tools are for amd64.

The release steps fail like so:

% make sync VERSION=v0.19.0
upgrading opentelemetry-proto submodule to v0.19.0
HEAD is now at 6459e1a Prepare for v0.19.0 release (#420)
rm -rf gen otlp
rm -rf ./gen/go
mkdir -p ./gen/go
docker run --rm -u 502 -v/Users/josh.macdonald/src/opentelemetry/proto-go:/Users/josh.macdonald/src/opentelemetry/proto-go -w/Users/josh.macdonald/src/opentelemetry/proto-go otel/build-protobuf:0.11.0 --proto_path="gen/proto"  --go_out=./gen/go gen/proto/opentelemetry/proto/common/v1/common.proto
Unable to find image 'otel/build-protobuf:0.11.0' locally
0.11.0: Pulling from otel/build-protobuf
Digest: sha256:a1f16b31cb70dca3e486afad20c268cf9d3ee776b0cd6656120c8e013c27a52c
Status: Downloaded newer image for otel/build-protobuf:0.11.0
WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
--go_out: protoc-gen-go: Plugin killed by signal 11.
make: *** [gen-otlp-protobuf] Error 1